Harrow or drag lift



NOV 1938 H. RICHARDSON HARROW OR DRAG LIFT Filed Oct. 27, 1957 2Sheets-Sheet 1 Hug/9 Rib/50114076027,

IN V EN TOR.

m Y N noA T T A Nov. 1, 1938.

H. RICHARDSON 2,135,241 HARROW OR DRAG LIFT Filed Oct. 27, 1937 2Sheets--Sheel 2 ATTORNEYS.

Patented Nov. 1, 1938 UNITED stares ear ENT oie-eresApplication-October- 27, 1937, Serial'No.` 151,302y

4` Claims.

This invention relatesv to harrow or drag lifts, oneof the objects beingto` providey simple and eicient means-whereby the harrow can.; be liftedbodily while moving forwardly, thereby to'raise Si the teethi from thelsoiland provide suicient clearance to allow accumulated weeds, stalksYand other materials, to'- slide downwardly from the teeth orfbecomestripped therefrom after which the teeth will returnto-the soil and theoperation of the barrow continued.

A- further object is to provide-meansunder the controllof` theoperatorfor bringing the lifting mechanism into-action whenever it is desired toclearV the teeth--of the harrow.

lb A still vfurther object is--to provide lifting means ofithistypewhichv canY be combined readily with various types of. drag harrows.

With. thezforegoing and other-objects in View whichf willv appear asthedescription proceeds,

the*inventionconsists-of certain novel details of construction andvcombinationsof parts. hereinafterV more fully described and pointed outin the claims', itbeing understood that changes may be made in:- theconstruction and arrangement of parts.withoutndepartingl from thetspiritofthe invention asclaimed.

In the accompanying drawings the preferred forms of the invention havebeen shown.

In' said' drawings- Figure 1. isa. planA viewof'laI harrow. or dragequppedwith the present.I improvements.

Figure 2V is .a sideelevation thereof.

Eigurez3;is an. enlargedsection online 3 3, Figure 1,v the lifting;segmentbeing. ina position opposite `to. .that shownainEigure.- 1.

Figure 4.1.is an enlargedlrearfelevation of the lifting'mechanism,.thesegmentgbeingshown in its raisedy or. normal .position Yas; in Figure l.

Eigure 5- is anenlarged:section; on line 5-,-5,

4o Eigure..

Figure 6 isa-section on line 1 6 6. Figure 5.

Figure 7 isLaview partly: in section andpartly in plan; showingaportionof a' modied form of; lifting mechanism.

FigureS` is a secti'on onzline; 8-8Figure "1.

Eigure 9U4 is an enlarged; section on. line, 9er-9 Eigure.,

Referring:r to, the Lgures; by characters of reference. I designates adrag harrow of any desiredorconstruction,having cross bars 2 .from whichextend. teeth. 3. This harrow is adapted to be drawn by any suitablemeans and, as is well known.to .those skilled1in the-art, aconsiderableamountoftrash intheform of. weeds. stalks, etc., wilLultimately.laccumulate on the teeth. Hereto.-

fore ithas been aidiiiicult'mattertoremove these in-order thatthe-harrowmight continue tofunction properly. The present' includesmeans whereby; wheneveridesired; theharrow can be lifted bodily4 soV asto withdraw the teeth from the accurnulalwed'- trash and hold them inraised position until the teeth have bridged over the deposited* pileswhereupon the teethY willreturn automatically into-engagernent with thesoil and the parts restored to theirinitial-positions; 10

For' the' purpose of producing the foregoing result there ismounted'onone-of the bars or rods 2 asplit-sleeve made up of upper andlower-sections 4 and 5- adjacent the ends of which are located laterallyextended earsV 6- andu 1' respectively adapted'tol be drawntogether bybolts 8'so vas thus to-be bound securely to therod-Z A- collarr 9 isformed on sleeve 4 and constitut'esfanl abutment for-the hub'lll of asemi-circular segment I Iwhich is freely rotatableon the hub and: isretained thereon preferably by the ears-*1.

Thesegment is normally positionedv with its flat sidefor base-lowermostand its arcuate portion uppermost, as shown for example in Figure 2 andaprojecting nose or counterbal'ance I2 is 25 located at'that end-off thebase` of the segment which-normally is nearestthe'front of the harrow.

Ratchet teeth' I3# aref-providedl onv one sidev ofthefarcuatelportionof-the'segment I=I and are for thepurpose hereinafter`set' forth. 0

Mounted onfvsleevel 4`between collar 9-: and the ears 6 is arotatablecollar made up---of4v a' yoke I4 constituting*v thelower member andl aclamping plate- I5# constituting theV upper member. Theseclamping-plates straddle sleeve 4 and also-receive betweenthem the endslof yoke I4 to which they are held byV bolts I6 which serve not only-t0hold the plate I5' tothe yoke I4 but'also serve to-hold the clampingplate I5 normallypressed'together as shown.,

Matching grooves, I'I are providedinthe inner faces of the plates I5"and'mounted' for rotation in these grooves is a,rod" I8,having acrankarm I9 at one endand anoperatinglever 20Q at itsiother end. A. coiledspring 2l. connects the crank arm I9 to a portion-of the barrow-frame,this. spring beingpositioned at such anangle-as to hold lever 20normally swung backwardly tov a. substantially upright position, asshown. in Figure, andlatf erally so asto engage` betweenthe teeth I3V onthe upwardly extending; arcuate portion of, the segment. I I.

An operating line ZZ. isv attached to thefupper end of' lever 20 andisextended forwardlyv toVA a.

Al Il point where it can be conveniently grasped and actuated by thedriver.

The harrow is operated in the usual way for the purpose of cultivatingthe soil. Should trash accumulate on the teeth 3 so as to interfere withthe proper functioning of the device,.the operatorrpulls on the line 22so as to swinglever 20 forwardly away from its normal position and Yagainst the action of spring 2l. YDuring this forward movement the leverremains in engagement with one of the ratchet teeth I3 and, conse-"quently, the segment II will be moved with the lever, its nose orcounterbalance I2 swinging downwardly intoY contact with'the surface ofthe soil. As soon as this contact is made, further forward movementofthe-harrow will cause the segment to function like a wheel and it willmove into an inverted positiongas Vshown in Figure 3, thereby Yliftingthe harrow bodily so as to raise the teeth and allow the accumulatedVi'lrash toy Y slide from them. The harrow will remain in elevatedposition as long as the segment is located with itsarcuate, portionlowermost. During this rotation of the segment the ratchetteeth willslip out of engagement with the lever but the lever( preferably will beheld in a forwardly Y inclined position; VUltimately the'weightedadvancing end I2 of the segment will move upwardly and forwardly pastthe dead center so that the segment will continue -to travel in acircular direction after `the harrow has beenflowered with its teeth inengagement with the soil and until the advancingratchet teeth I3 comeagainst and snaps past the lever. Said lever can then be released sothat its spring will return itrone end thereof Ywhile a cylindrical stud25 is extended from the opposite end. Arm 24 hasan ear 26 with anopening 2'I which alines with stud 25. A plate 28 straddles the uppermember 4 ofthe sleeve on rod 2 and has a stud V29 projecting in onedirection therefrom and seated for rotation in the opening 21. Achanneled arm 30 is extended in the opposite direction from plate 28 andstraddles stud 25. This arm is held to the stud by a key 3l whichextends through the sides of the channeled arm and loosely through anenlarged opening 32 instud 25.` The free end portion of the key can beanchored to arm 30 as shown at 33 so as to insure rotation of the key 3Iwith the arm should the plate 28.be swung about the axis of the studs 25and 29 and relative to the yoke 23. Keyr3I has a radial arm 34 whichjoins it to one end of* a coiled spring 35,V

this spring Vbeing attached rtova portion of the harrow frame so as toexertr a constant pull upon the parts to which it is connected. 'A'lever36 is VKfixedly attached to plate 278 and the ytautness of spring '35serves Yto press plate 28 and lever 36 normally in thedirectionindicated by the arrow in Figure 9V so that lever 36 is thus normallypressed against the toothed side of the segment Y II. However when thelever 36 is swung about the axes of rod 2 the spring 35 will be placedincluding a frame and toothed bars in the frame, of a segment mountedfor free rotation on one of the bars, a combined nose and counterbalanceprojecting from one end of the segment at .the base thereof, saidsegment being positioned normally `with its base lowermost and.V

with the nose extended in the direction of travel of the'harrow,ja levermounted for movement upon the axis of the bar and laterally toward andfrom the segment, ratchet teeth on the segmentV for engagement with thelever, yieldingmeans for holding the lever normally in engagementwiththe teeth of the segment and normally in `an upwardly extended positiontoy hold the segmentV and lever against free rotation, and means foractuating said lever to move the segment about the axis of the Vbar andbring the nose into contact with the soil.

The combination with the frame of a drag i harrow and4 av toothed barmounted therein, of a segment mounted for rotation about the axis of thebar, said segment having aprojecting counterbalance at one end of thebase of the segment, teeth on the segment, a lever normally engaged bythe teeth, yielding means for 'resisting the actuation of the lever andmaintaining the lever normally in one position andin engagement with thetoothed portion of the 'segment to maintain the Asegment with its base Ylowermost, means for actuating the lever away The lever is to be fromits normal Yposition to rotate the segment e and bring thecounterbalance in engagement with the soil, said segment constitutingmeans for holdingV the harrow disengaged from vthe soil when the segmentis positioned with its base e' uppermost.

3. The combination with aV harrow or drag Y including a frame and atoothed bar therein, of a sleeve on the bar, a segment having a hubmounted for rotation on thesleeve, a lever mounted-to swing about theaxis of the sleeve and Y laterally toward and from the segment, yieldingmeans for resisting the movementof the lever in either of saiddirections, means for swingingk the lever out of normal rposition andagainst the action of said yielding means, and a tooth on the segmentfor engagement by the lever to move the segment with the lever about theaxis of the sleeve and into contact with the ground "under to v theharrow, said segmentV constituting means for Y rolling contact with thesurface of the ground to support the harrow in raised position, and saidtooth constituting means for wiping engagement with the lever torecouple the lever to the'segment when said segment is moved toward itsinitial position, and a combined counterbalance and projecting nose atone end of the segment for moving said segment by gravity whendisengaged from Ythe soil to restore engagement of the tooth with therever. f Y f 4. The combination with a harrow or. drag including a frameand a toothed bar the frame,

of a bearing sleeve secured to the bar, a Segment Cri Cil

mounted for rotation on the sleeve, a combined counterbalance and noseat one end of the base of the segment, said base being normallylowermost with the nose or counterbalance extended in the direction ofmovement of the harrow, connected members mounted for rotation on thesleeve, a rod mounted for rotation relative to and supported by themembers, said rod being extended across the axis of rotation of thesegment, a lever at one end of the rod, an arm at the other end thereof,and a spring connected to the arm and positioned to exert a constantpull upon the arm to maintain the lever normally pressed laterallyagainst the segment and in an upwardly extended position, means forshifting the lever about the axis of the sleeve and away from normalposition, and means on the segment for engagement by the lever to rotatethe segment therewith and bring the nose into contact with the soilthereunder.

HUGH RICHARDSON.

